Investigation the positive moments on the $M$$-$$T$ curve of YBCO films measured by using zero-field cooling

doi:10.1088/1009-1963/11/4/312

Abstract

Abstract The superconducting transition of a YBCO film was measured by a MPMS-5 superconducting quantum interference device magnetometer, using a zero-field cooling process. The experimental results have shown that there are positive magnetic moment and positive peak on the

M

-

T

curve. We have proven that these anomalous behaviours are due to measurement error, but not phase transition. We have proposed a simple formula to explain and to calculate quantitatively these anomalous behaviours. It was found that, provided dH>0.59H_p (dH is the inhomogeneous field of the remnant field, H_p is the fully penetrated field of the measured sample), the experimental results will be positive, not negative. If dH≥2H_p, the experimental results will be symmetrical to their real negative values. From the

M

-

T

curve, which has positive moment and positive peak below T_c (superconducting transition temperature), we found a new possible method to obtain H_p of the measured sample.

Keywords: SQUID magnetometer remnant field superconducting

M

-

T

curve flux pinning positive moment superconducting paramagnetic Meissner effect

Received: 20 April 2001
Revised: 13 December 2001
Accepted manuscript online:

PACS:	74.78.-w	(Superconducting films and low-dimensional structures)
	85.25.Dq	(Superconducting quantum interference devices (SQUIDs))
	74.20.Mn	(Nonconventional mechanisms)
	74.25.Qt
	74.25.Ha	(Magnetic properties including vortex structures and related phenomena)

Fund: Project supported by the National High Technology Development Programme of China (Grant No 863-CD090000).

Cite this article:

Guo Shu-Quan (郭树权), Wang Feng-Lin (王凤林), Zhou Yue-Liang (周岳亮), Zhao Bai-Ru (赵柏儒), Gao Ju (高炬) Investigation the positive moments on the $M$ $-$ $T$ curve of YBCO films measured by using zero-field cooling 2002 Chinese Physics 11 379

[1]	Flux pinning evolution in multilayer Pb/Ge/Pb/Ge/Pb superconducting systems Li-Xin Gao(高礼鑫), Xiao-Ke Zhang(张晓珂), An-Lei Zhang(张安蕾), Qi-Ling Xiao(肖祁陵), Fei Chen(陈飞), and Jun-Yi Ge(葛军饴). Chin. Phys. B, 2023, 32(3): 037402.
[2]	Strongly enhanced flux pinning in the YBa₂Cu₃O_7-X films with the co-doping of BaTiO₃ nanorod and Y₂O₃ nanoparticles at 65 K Wang Hong-Yan (王洪艳), Ding Fa-Zhu (丁发柱), Gu Hong-Wei (古宏伟), Zhang Teng (张腾). Chin. Phys. B, 2015, 24(9): 097401.
[3]	Retrieval of original signals for superconducting quantum interference device operating in flux locked mode Liu Dang-Ting (刘当婷), Tian Ye (田野), Zhao Shi-Ping (赵士平), Ren Yu-Feng (任育峰), Chen Geng-Hua (陈赓华). Chin. Phys. B, 2015, 24(4): 047402.
[4]	Strong flux pinning enhancement in YBa₂Cu₃O_7-x films by embedded BaZrO₃ and BaTiO₃ nanoparticles Ding Fa-Zhu (丁发柱), Gu Hong-Wei (古宏伟), Zhang Teng (张腾), Wang Hong-Yan (王洪艳), Qu Fei (屈飞), Qiu Qing-Quan (邱清泉), Dai Shao-Tao (戴少涛), Peng Xing-Yu (彭星煜). Chin. Phys. B, 2013, 22(7): 077401.
[5]	Matching effect in superconducting NbN thin film with a square lattice of holes Muhammad Kamran, He Shi-Kun(何世坤), Zhang Wei-Jun(张伟君), Cao Wen-Hui(曹文会), Li Bo-Hong(李博宏), Kang Lin(康琳), Chen Jian(陈健), Wu Pei-Heng(吴培亨), and Qiu Xiang-Gang(邱祥冈). Chin. Phys. B, 2009, 18(10): 4486-4489.
[6]	A FORMULA FOR CALCULATING THE ERRORS OF SUPERCONDUCTING MAGNETIZATION CURVE Guo Shu-quan (郭树权), Liu Meng-lin (刘梦林), Zheng Dong-ning (郑东宁), Zhao Bai-ru (赵柏儒). Chin. Phys. B, 2001, 10(7): 658-661.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

Investigation the positive moments on the M−T curve of YBCO films measured by using zero-field cooling

Cite this article:

Online attention

Investigation the positive moments on the $M$ $-$ $T$ curve of YBCO films measured by using zero-field cooling